Gravity may have Saved Universe from Collapsing after Big Bang

A new study has revealed that gravity may have saved the universe from collapsing immediately after the Big Bang. Studies of the Higgs particle have suggested that the production of Higgs particles during the accelerating expansion of the very early universe (inflation) should have led to instability and collapse.

Physicists at the Imperial College London and the Universities of Copenhagen and Helsinki believe that the interaction between Higgs boson particles and gravity had a stabilizing effect on the very early universe, thereby preventing the Big Crunch – a catastrophic collapse into nothing – from occurring shortly after the Big Bang.

Professor Arttu Rajantie, from the Department of Physics at Imperial College London said that their research investigates the last unknown parameter in the Standard Model – the interaction between the Higgs particle and gravity. This parameter cannot be measured in particle accelerator experiments, but it has a big effect on the Higgs instability during inflation. Even a relatively small value is enough to explain the survival of the universe without any new physics.

Why didn’t the universe collapse immediately after the Big Bang?

The physicists will now use data from current and future European Space Agency missions measuring cosmic microwave background radiation and gravitational waves to check on the interaction they suggest.

The team says it will now use observations of the universe on the largest scales to look at this interaction in more detail. In particular, they say, they will use data from current and future European Space Agency missions measuring cosmic microwave background radiation and gravitational waves. Rajantie explained:

“Our aim is to measure the interaction between gravity and the Higgs field using cosmological data. If we are able to do that, we will have supplied the last unknown number in the Standard Model of particle physics and be closer to answering fundamental questions about how we are all here”.

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